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# Universal Fluidic Logic Element

IP.com Disclosure Number: IPCOM000090446D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 27K

IBM

## Related People

Hellerman, L: AUTHOR

## Abstract

This universal fluidic logic element performs any two-variable logic functions by an appropriate setting of valves. Groups of these elements can be combined to synthesize an arbitrary three-variable and general N-variable logic function. The universal fluidic logic element is based on the wall-attachment principle utilized in all previous fluidic logic devices. The universal structure for a general two-variable logic function Z=f(X,Y) is shown. The fluid is introduced at a particular velocity from a power source PS through orifice 10. Control ports X0 and X1, one on each side of the fluid stream, correspond to the two values of the independent logic variable X. Thus, depending on the value of X, there is an input either from port X0 or port X1 which determines to which of the walls 12 and 14 the fluid stream attaches.

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Universal Fluidic Logic Element

This universal fluidic logic element performs any two-variable logic functions by an appropriate setting of valves. Groups of these elements can be combined to synthesize an arbitrary three-variable and general N-variable logic function. The universal fluidic logic element is based on the wall-attachment principle utilized in all previous fluidic logic devices. The universal structure for a general two-variable logic function Z=f(X,Y) is shown. The fluid is introduced at a particular velocity from a power source PS through orifice 10. Control ports X0 and X1, one on each side of the fluid stream, correspond to the two values of the independent logic variable X. Thus, depending on the value of X, there is an input either from port X0 or port X1 which determines to which of the walls 12 and 14 the fluid stream attaches. The second independent logic variable Y has eight control ports, of which four correspond to the value Y0, and four correspond to Y1. Two Y0 and two Y1 ports control each branch of the X output. The Y0 and Y1 controls are each numbered from 1...4 and grouped into four port-pairs according to whether they are numbered odd or even and to whether their value is Y0 or Y1. Port-Pair Ports Odd Y0 1Y0, 3Y0 Even Y0 2Y0, 4Y0 Odd Y1 1Y1, 3Y1 Even Y1 2Y1, 4Y1.

The odd port-pairs control one branch of the X output, and the even port- pairs control the other branch. Each Y port has a stop valve, which can be closed manually, effec...